A block starts sliding down a rough plane inclined at to the horizontal

PHYSICS · Single correct · A Level · Physics · Mechanics and materials · Mechanics and materials

Problem

5\,\text{kg}

block starts sliding down a rough plane inclined at

30^{\circ}

to the horizontal. The coefficient of kinetic friction between the block and the plane is

0.20

. Take

g = 10\,\text{m\,s}^{-2}

. What is the acceleration of the block along the plane? (a)

5.0\,\text{m\,s}^{-2}

(b)

6.7\,\text{m\,s}^{-2}

(c)

3.3\,\text{m\,s}^{-2}

(d)

4.0\,\text{m\,s}^{-2}